H3C S5500-HI Switch Series Fundamentals Configuration Manual

Brand: H3C

Model: S5500-HI Switch Series

Category: Networking

Type: Fundamentals Configuration Manual

H3C S5500-HI Switch Series

Fundamentals Configuration Guide

Hangzhou H3C Technologies Co., Ltd.

http://www.h3c.com

Software version: Release 5101

Document version: 6W100-20111031

No part of this manual may be reproduced or transmitted in any form or by any means without prior

written consent of Hangzhou H3C Technologies Co., Ltd.

Trademarks

H3C,

, Aolynk, , H

Care,

, TOP G, , IRF, NetPilot, Neocean, NeoVTL,

SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V

G, V

G, PSPT,

XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co.,

Ltd.

All other trademarks that may be mentioned in this manual are the property of their respective owners

Notice

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Preface

The H3C S5500-HI documentation set includes 11 configuration guides, which describe the software

features for the H3C S5500-HI Switch Series Release 5101, and guide you through the software

configuration procedures. These configuration guides also provide configuration examples to help you

apply software features to different network scenarios.

The Fundamentals Configuration Guide describes how to configure the command line interface (CLI), log

in to the switch, perform file management, configuration file management, and device management for

your switch, upgrade the software, ISSU and perform automatic configuration.

This preface includes:

• Audience

• Conventions

• About the S5500-HI documentation set

• Obtaining documentation

• Technical support

• Documentation feedback

Audience

This documentation is intended for:

• Network planners

• Field technical support and servicing engineers

• Network administrators working with the S5500-HI Switch Series

Conventions

This section describes the conventions used in this documentation set.

Command conventions

Convention Description

Boldface Bold text represents commands and keywords that you enter literally as shown.

Italic Italic text represents arguments that you replace with actual values.

[ ] Square brackets enclose syntax choices (keywords or arguments) that are optional.

{ x | y | ... }

Braces enclose a set of required syntax choices separated by vertical bars, from which

you select one.

[ x | y | ... ]

Square brackets enclose a set of optional syntax choices separated by vertical bars, from

which you select one or none.

{ x | y | ... } *

Asterisk marked braces enclose a set of required syntax choices separated by vertical

bars, from which you select at least one.

Convention Description

[ x | y | ... ] *

Asterisk marked square brackets enclose optional syntax choices separated by vertical

bars, from which you select one choice, multiple choices, or none.

&<1-n>

The argument or keyword and argument combination before the ampersand (&) sign can

be entered 1 to n times.

# A line that starts with a pound (#) sign is comments.

GUI conventions

Convention Description

Boldface

Window names, button names, field names, and menu items are in Boldface. For

example, the New User window appears; click OK.

> Multi-level menus are separated by angle brackets. For example, File > Create > Folder.

Symbols

Convention Description

WARNING

An alert that calls attention to important information that if not understood or followed can

result in personal injury.

CAUTION

An alert that calls attention to important information that if not understood or followed can

result in data loss, data corruption, or damage to hardware or software.

IMPORTANT

An alert that calls attention to essential information.

NOTE

An alert that contains additional or supplementary information.

TIP

An alert that provides helpful information.

Network topology icons

Represents a generic network device, such as a router, switch, or firewall.

Represents a routing-capable device, such as a router or Layer 3 switch.

Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that supports

Layer 2 forwarding and other Layer 2 features.

Port numbering in examples

The port numbers in this document are for illustration only and might be unavailable on your device.

About the S5500-HI documentation set

The H3C S5500-HI documentation set includes:

Documents Purposes

Product description and specifications

Marketing brochure Describe product specifications and benefits.

Documents Purposes

Technology white papers

Provide an in-depth description of software features and

technologies.

Hardware specifications and installation

Compliance and safety manual

CE DOCs

Provide regulatory information and the safety instructions that must be

followed during installation.

Installation quick start

Guides you through initial installation and setup procedures to help

you quickly set up your device.

Installation guide Provides a complete guide to switch installation and specifications.

PSR150-A [ PSR150-D ] Power

Modules User Manual

Describe the specifications, installation, and replacement of hot

swappable 150W power modules.

RPS Ordering Information for H3C

Low-End Ethernet Switches

Helps you order RPSs for switches that can work with an RPS.

User manuals for RPSs Describe the specifications, installation, and replacement of RPSs.

User manuals for interface cards

Describe the specifications, installation, and replacement of

expansion interface cards.

H3C Low End Series Ethernet Switches

Pluggable Modules Manual

Describes the specifications of pluggable transceiver modules.

Pluggable SFP[SFP+][XFP] Transceiver

Modules Installation Guide

Describe the installation, and replacement of SFP/SFP+/XFP

transceiver modules.

Software configuration

Configuration guides Describe software features and configuration procedures.

Command references Provide a quick reference to all available commands.

Operations and maintenance

H3C Series Ethernet Switches Login

Password Recovery Manual

Helps you deal with switch login password loss.

Release notes

Provide information about the product release, including the version

history, hardware and software compatibility matrix, version

upgrade information, technical support information, and software

upgrading.

Obtaining documentation

You can access the most up-to-date H3C product documentation on the World Wide Web at

http://www.h3c.com

Click the links on the top navigation bar to obtain different categories of product documentation:

[Technical Support & Documents > Technical Documents]

– Provides hardware installation, software

upgrading, and software feature configuration and maintenance documentation.

[Products & Solutions]

– Provides information about products and technologies, as well as solutions.

[Technical Support & Documents > Software Download]

– Provides the documentation released with the

software version.

Technical support

cu[email protected]

http://www.h3c.com

Documentation feedback

You can e-mail your comments about product documentation to inf[email protected].

We appreciate your comments.

Contents

CLI configuration·························································································································································· 1

What is CLI? ······································································································································································1

Entering the CLI ·································································································································································1

Command conventions ·····················································································································································1

Undo form of a command················································································································································2

CLI views ············································································································································································2

CLI view description·················································································································································2

Entering system view················································································································································3

Exiting the current view············································································································································3

Returning to user view··············································································································································4

Using the CLI online help ·················································································································································4

Entering commands···························································································································································5

Editing command lines·············································································································································5

Entering a value of the STRING type ·····················································································································5

Entering incomplete keywords ································································································································6

Configuring command aliases ································································································································6

Configuring CLI hotkeys···········································································································································7

Redisplaying entered but not submitted commands ·····························································································8

Understanding command-line errors ·······························································································································8

Using command history····················································································································································9

Accessing history commands ··································································································································9

Configuring the history buffer size ·························································································································9

Controlling the CLI display············································································································································ 10

Multi-screen display··············································································································································· 10

Filtering output information··································································································································· 11

Configuring user privilege and command levels ········································································································ 14

Introduction ···························································································································································· 14

Configuring a user privilege level ······················································································································· 14

Switching user privilege level······························································································································· 17

Modifying the level of a command ····················································································································· 20

Saving the current configuration ·································································································································· 20

Displaying and maintaining CLI ··································································································································· 21

Login methods ····························································································································································22

Login methods································································································································································· 22

User interface overview················································································································································· 23

Users and user interfaces······································································································································ 23

Numbering user interfaces ··································································································································· 23

CLI login······································································································································································25

Logging in through the console port ···························································································································· 25

Configuration requirements·································································································································· 25

Login procedure····················································································································································· 26

Console login authentication modes ··················································································································· 28

Configuring none authentication for console login ··························································································· 29

Configuring password authentication for console login ··················································································· 30

Configuring scheme authentication for console login ······················································································· 31

Configuring common settings for console login (optional) ··············································································· 34

Logging in through Telnet·············································································································································· 36

Telnet login authentication modes ······················································································································· 36

Configuring none authentication for Telnet login ······························································································ 37

Configuring password authentication for Telnet login ······················································································ 38

Configuring scheme authentication for Telnet login ·························································································· 40

Configuring common settings for VTY user interfaces (optional)······································································ 43

Configuring the device to log in to a Telnet server as a Telnet client······························································ 44

Logging in through SSH ················································································································································ 45

Configuring the SSH server·································································································································· 46

Configuring the SSH client to log in to the SSH server ····················································································· 49

Logging in through modems ········································································································································· 50

Modem login authentication modes ···················································································································· 54

Configuring none authentication for modem login···························································································· 55

Configuring password authentication for modem login···················································································· 56

Configuring scheme authentication for modem login ······················································································· 57

Configuring common settings for modem login (optional)················································································ 60

Displaying and maintaining CLI login ························································································································· 62

Web login ··································································································································································64

Web login overview ······················································································································································ 64

Configuring HTTP login ················································································································································· 64

Configuring HTTPS login ··············································································································································· 65

Displaying and maintaining web login ······················································································································· 67

Web login example······················································································································································· 68

HTTP login example ·············································································································································· 68

HTTPS login example ············································································································································ 69

NMS login ··································································································································································72

NMS login overview······················································································································································ 72

Configuring NMS login················································································································································· 72

NMS login example······················································································································································· 73

User login control·······················································································································································76

User login control overview ·········································································································································· 76

Configuring login control over Telnet users················································································································· 76

Configuration preparation···································································································································· 76

Configuring source IP-based login control over Telnet users ············································································ 76

Configuring source and destination IP-based login control over Telnet users ················································ 77

Configuring source MAC-based login control over Telnet users······································································ 77

Source MAC-based login control configuration example················································································· 78

Configuring source IP-based login control over NMS users······················································································ 79

Configuring source IP-based login control over NMS users············································································· 79

Source IP-based login control over NMS users configuration example ·························································· 80

Configuring source IP-based login control over web users ······················································································· 81

Configuring source IP-based login control over web users··············································································· 81

Logging off online web users ······························································································································· 81

Source IP-based login control over web users configuration example ···························································· 82

FTP configuration························································································································································83

FTP overview··································································································································································· 83

Introduction to FTP ················································································································································· 83

FTP operation························································································································································· 83

Configuring the FTP client ············································································································································· 84

Establishing an FTP connection···························································································································· 85

iii

Managing directories on the FTP server ············································································································· 86

Operating the files on the FTP server ·················································································································· 86

Changing the username after FTP login·············································································································· 87

Maintaining and debugging the FTP connection······························································································· 88

Terminating an FTP connection···························································································································· 88

FTP client configuration example························································································································· 88

Configuring the FTP server ············································································································································ 90

Configuring FTP server operating parameters···································································································· 90

Configuring authentication and authorization on the FTP server ····································································· 91

FTP server configuration example························································································································ 92

Displaying and maintaining FTP··································································································································· 93

TFTP configuration······················································································································································95

TFTP overview································································································································································· 95

Introduction to TFTP ··············································································································································· 95

TFTP operation ······················································································································································· 95

Configuring the TFTP client············································································································································ 96

Displaying and maintaining the TFTP client ················································································································ 97

TFTP client configuration example································································································································ 97

File system management············································································································································99

File system overview ······················································································································································ 99

Filename formats ··················································································································································· 99

Managing files ······························································································································································· 99

Displaying file information ·································································································································100

Displaying the contents of a file·························································································································100

Renaming a file····················································································································································100

Copying a file······················································································································································100

Moving a file························································································································································100

Deleting a file·······················································································································································100

Restoring a file from the recycle bin··················································································································101

Emptying the recycle bin ····································································································································101

Managing directories ··················································································································································101

Displaying directory information ·······················································································································101

Displaying the current working directory··········································································································101

Changing the current working directory···········································································································102

Creating a directory············································································································································102

Removing a directory··········································································································································102

Managing storage media ···········································································································································102

Managing the space of a storage medium ······································································································102

Displaying and maintaining the NAND flash memory ···················································································103

Performing batch operations·······································································································································103

Setting the file system operation modes ····················································································································104

File system management examples ····························································································································104

Configuration file management ····························································································································· 106

Configuration file overview·········································································································································106

Types of configuration ········································································································································106

Format and content of a configuration file ·······································································································107

Coexistence of multiple configuration files ·······································································································107

Startup with the configuration file······················································································································107

Saving the running configuration ·······························································································································107

Enabling configuration file auto-save ················································································································108

Selecting the modes for saving the configuration file······················································································108

Setting configuration rollback·····································································································································109

Configuration rollback ········································································································································109

Configuration task list ·········································································································································110

Configuring parameters for saving the current running configuration ··························································110

Enabling automatic saving of the running configuration ················································································111

Manually saving the running configuration······································································································112

Setting configuration rollback ····························································································································112

Specifying a startup configuration file·······················································································································113

Backing up the startup configuration file···················································································································113

Deleting a startup configuration file···························································································································113

Restoring a startup configuration file ·························································································································114

Displaying and maintaining a configuration file ······································································································114

Software upgrade configuration···························································································································· 116

Device software overview ···········································································································································116

Software upgrade methods·········································································································································116

Software upgrade through a system reboot··············································································································117

Upgrading Boot ROM through a system reboot ······························································································117

Upgrading system software through a system reboot (method I)···································································118

Upgrading system software through a system reboot (method II) ··································································118

Software upgrade by installing hotfixes ····················································································································119

Basic concepts in hotfix ······································································································································119

Patch state ····························································································································································119

Hotfix configuration task list ·······························································································································122

Configuration prerequisites ································································································································122

Installing a patch in one step ·····························································································································122

Installing a patch step-by-step ····························································································································123

Uninstalling a patch step-by-step ·······················································································································125

Displaying and maintaining software upgrade ········································································································126

Software upgrade configuration examples ···············································································································126

Immediate upgrade configuration example ·····································································································126

Hotfix configuration example·····························································································································128

ISSU configuration ·················································································································································· 129

ISSU overview ······························································································································································129

ISSU process and states······································································································································129

System software version rollback·······················································································································131

ISSU configuration task list ·································································································································131

Prerequisites for performing ISSU ······················································································································132

Enabling version compatibility check················································································································133

Configuring ISSU·················································································································································133

Configure the ISSU version rollback timer········································································································135

Displaying and maintaining ISSU······················································································································136

ISSU configuration example··································································································································· 137

Current network status and requirements analysis ···································································································137

Current network status ········································································································································137

Network requirements·········································································································································137

Configuration procedure·············································································································································138

Prerequisites ·························································································································································138

ISSU upgrade preparation ·································································································································140

Performing compatible ISSU upgrade···············································································································144

Performing incompatible ISSU upgrade············································································································145

Device management ··············································································································································· 147

Device management overview····································································································································147

Configuring the device name ·····································································································································147

Changing the system time ···········································································································································147

Configuration guidelines ····································································································································147

Configuration procedure ····································································································································150

Enabling displaying the copyright statement ············································································································150

Configuring banners····················································································································································151

Introduction to banners ·······································································································································151

Configuration procedure ····································································································································152

Configuring the exception handling method·············································································································152

Rebooting the device ···················································································································································153

Rebooting devices immediately at the CLI ········································································································153

Scheduling a device reboot ·······························································································································153

Scheduling jobs····························································································································································154

Job configuration approaches ···························································································································154

Scheduling a job in the non-modular approach ······························································································155

Scheduling a job in the modular approach ·····································································································155

Disabling Boot ROM access ·······································································································································156

Configuring the power-saving function······················································································································156

Enabling the power-saving function ··················································································································156

Configuring power-saving status ·······················································································································157

Configuring the port status detection timer················································································································157

Configuring temperature thresholds for a device ·····································································································158

Clearing unused 16-bit interface indexes··················································································································159

Verifying and diagnosing transceiver modules·········································································································159

Verifying transceiver modules ····························································································································159

Diagnosing transceiver modules························································································································160

Displaying and maintaining device management····································································································160

Automatic configuration ········································································································································· 162

Automatic configuration overview······························································································································162

Typical automatic configuration network···················································································································162

How automatic configuration works ··························································································································163

Automatic configuration work flow ···················································································································163

Using DHCP to obtain an IP address and other configuration information ··················································164

Obtaining the configuration file from the TFTP server ·····················································································165

Executing the configuration file··························································································································167

Index ········································································································································································ 168

CLI configuration

What is CLI?

The command-line interface (CLI) enables you to interact with your device by entering text commands. At

the CLI, you can instruct your device to perform a given task by entering a text command and then

pressing Enter. Compared with a graphical user interface (GUI) where you use a mouse to perform

configuration, the CLI allows you to enter more information in one command line.

Figure 1 CLI example

Entering the CLI

The device provides multiple methods for entering the CLI, such as through the console port, through

Telnet, and through SSH. For more information, see the chapter “Login methods.”

Command conventions

Command conventions help you understand command meanings. Commands in product manuals

comply with the conventions listed in Table 1.

Table 1 Command conventions

Convention Description

Boldface Bold text represents commands and keywords that you enter literally as shown.

Italic Italic text represents arguments that you replace with actual values.

[ ] Square brackets enclose syntax choices (keywords or arguments) that are optional.

{ x | y | ... }

Braces enclose a set of required syntax choices separated by vertical bars, from which

you select one.

[ x | y | ... ]

Square brackets enclose a set of optional syntax choices separated by vertical bars, from

which you select one or none.

{ x | y | ... } *

Asterisk marked braces enclose a set of required syntax choices separated by vertical

bars, from which you select at least one.

Convention Description

[ x | y | ... ] *

Asterisk marked square brackets enclose optional syntax choices separated by vertical

bars, from which you select one choice, multiple choices, or none.

&<1-n>

The argument or keyword and argument combination before the ampersand (&) sign can

be entered 1 to n times.

# A line that starts with a pound (#) sign is comments.

NOTE:

The keywords of command lines are case insensitive.

Figure 2 shows how to read the clock datetime time date command by using Table 1 as a reference.

Figure 2 Read command line parameters

Following this example, you can enter the following command line at the CLI of your device and press

Enter to set the device system time to 10 o’clock 30 minutes 20 seconds, February 23, 2010.

<Sysname> clock datetime 10:30:20 2/23/2010

More complicated commands can be understood using Table 1 as a reference.

Undo form of a command

The undo form of a command restores the default, disables a function, or removes a configuration.

Almost all configuration commands have an undo form. For example, the info-center enable command

enables the information center, and the undo info-center enable command disables the information

center.

CLI views

CLI view description

Commands are grouped into different classes by function. To use a command, you must enter the class

view of the command.

CLI views adopt a hierarchical structure. See Figure 3.

• A

fter logging in to the switch, you are in user view. The user view prompt is <device name>. In user

view, you can perform display, debugging, and file management operations, set the system time,

restart your device, and perform FTP and Telnet operations.

• You can enter system view from user view. In system view, you can configure parameters such as

daylight saving time, banners, and short-cut keys.

• From system view, you can enter different function views. For example, enter interface view to

configure interface parameters, create a VLAN and enter its view, enter user interface view to

configure login user attributes, create a local user and enter local user view to configure the

password and level of the local user.

NOTE:

Enter ? in any view to display all the commands that can be executed in this view.

Figure 3 Command line views

……

Entering system view

When you log in to the device, you automatically enter user view, where <Device name> is displayed.

You can perform limited operations in user view, for example, display operations, file operations, and

Telnet operations. To perform further configuration on the device, enter system view.

Follow the step below to enter system view:

To do… Use the command… Remarks

Enter system view from user view system-view

Required

Available in user view

Exiting the current view

The CLI is divided into different command views. Each view has a set of specific commands and defines

the effective scope of the commands. The commands available to you at any given time depend on the

view you are in.

Follow the step below to exit the current view:

To do… Use the command… Remarks

Return to the parent view from the

current view

quit

Required

Available in any view.

NOTE:

• The quit command in user view terminates the current connection between the terminal and the

device.

• In public key code view, use the public-key-code end

command to return to the parent view (public ke

view). In public key view, use the peer-public-key end command to return to system view.

Returning to user view

This feature allows you to return to user view from any other view, without using the quit command

repeatedly. You can also press Ctrl+Z to return to user view from the current view.

Follow the step below to exit to user view:

To do… Use the command… Remarks

Return to user view return

Required

Available in any view except user

view

Using the CLI online help

Enter a question mark (?) to access online help. See the following examples.

1. Enter ? in any view to display all commands available in this view as well as brief descriptions of

the commands. For example:

<Sysname> ?

User view commands:

archive Specify archive settings

backup Backup next startup-configuration file to TFTP server

boot-loader Set boot loader

bootrom Update/read/backup/restore bootrom

cd Change current directory

…Part of the output is not shown…

2. When you enter part of a command and a ? separated by a space.

If ? is at the keyword position, the CLI displays all possible keywords with a brief description for each

keyword. For example:

<Sysname> terminal ?

debugging Send debug information to terminal

logging Send log information to terminal

monitor Send information output to current terminal

trapping Send trap information to terminal

If ? is at the argument position, the CLI displays a description about this argument. For example:

<Sysname> system-view

[Sysname] interface vlan-interface ?

<1-4094> VLAN interface

[Sysname] interface vlan-interface 1 ?

<cr>

[Sysname] interface vlan-interface 1

The string <cr> indicates that the command is a complete command, and you can be executed by

pressing Enter.

3. Enter an incomplete character string followed by?. The CLI displays all commands starting with the

entered character(s).

<Sysname> f?

fixdisk

format

free

ftp

<Sysname> display ftp?

ftp

ftp-server

ftp-user

Entering commands

Editing command lines

Table 2 Editing functions

Key Function

Common keys

If the edit buffer is not full, pressing a common key inserts the character at the

position of the cursor and moves the cursor to the right.

Backspace

Deletes the character to the left of the cursor and moves the cursor back one

character.

Left arrow key or Ctrl+B The cursor moves one character space to the left.

Right arrow key or Ctrl+F The cursor moves one character space to the right.

Tab

If you press Tab after entering part of a keyword, the system automatically

completes the keyword:

• If there is a unique match, the system substitutes the complete keyword for

the incomplete one and displays it in the next line.

• If there is more than one match, you can press Tab repeatedly to cycle

through all the keywords starting with the character string that you

entered.

• If there is no match, the system does not modify the incomplete keyword

and displays it again in the next line.

Entering a value of the STRING type

A value of the STRING type can contain any printable character except the question mark (?), quotation

mark (“), backward slash (\), and the blank space. The ASCII code range of printable characters is from

32 to 126. For example:

<Sysname> system-view

[Sysname] snmp-agent group v3 ?

STRING<1-32> Group name

In this example, the SNMPv3 group name is an argument of the STRING type. It can contain 1 to 32

characters, each of which can be any printable character except the question mark (?), quotation mark

(“), backward slash (\), and the blank space. You can enter a value such as test-v3.

Entering incomplete keywords

You can enter a command comprising incomplete keywords that can uniquely identify the complete

command.

In user view, for example, commands starting with an s include startup saved-configuration and

system-view.

• To enter system view, enter sy.

• To set the configuration file to be used at the next startup, enter st s.

You can also press Tab to have an incomplete keyword automatically completed.

Configuring command aliases

The command alias function allows you to replace the first keyword of a command with your preferred

keyword. For example, if you configure show as the replacement for the display keyword, then to execute

the display xx command, you can enter the command alias show xx.

Note the following guidelines when configuring command aliases:

• When you enter a command alias, the system displays and saves the command in its original

format instead of its alias. In other words, you can define and use a command alias but the

command is not restored in its alias format.

• When you define a command alias, the cmdkey and alias arguments must be in their complete

form.

• When you enter an incomplete keyword that partially matches both a defined alias and the

keyword of a command and the command alias function is enabled, the alias takes precedence. To

execute the command whose keyword partially matches your input, enter the complete keyword.

When you enter a character string that partially matches multiple aliases, the system gives you

prompts.

• If you press Tab after you enter an alias keyword, the original format of the keyword is displayed.

• You can replace only the first keyword of a non-undo command instead of the complete command.

You can replace only the second keyword of undo commands.

Follow these steps to configure command aliases:

To do… Use the command… Remarks

Enter system view system-view —

Enable the command alias function command-alias enable

Required

Disabled by default, which means

you cannot configure command

aliases.

Configure a command alias

command-alias mapping cmdkey

alias

Required

Not configured by default.

Configuring CLI hotkeys

Follow these steps to configure CLI hotkeys:

To do… Use the command… Remarks

Enter system view system-view —

Configure CLI hotkeys

hotkey { CTRL_G | CTRL_L |

CTRL_O | CTRL_T | CTRL_U }

command

Optional

The Ctrl+G, Ctrl+L and Ctrl+O

hotkeys are specified at the CLI by

default.

Display hotkeys

display hotkey [ | { begin |

exclude | include }

regular-expression ]

Available in any view. See Table 3

for hotkeys reserved by the syst

em.

NOTE:

By default, the Ctrl+G, Ctrl+L and Ctrl+O hotkeys are associated with pre-defined commands as defined

below, but the Ctrl+T and Ctrl+U hotkeys are not.

• Ctrl+G corresponds to the display current-configuration command.

• Ctrl+L corresponds to the display ip routing-table command.

• Ctrl+O corresponds to the undo debugging all command.

Table 3 Hotkeys reserved by the system

Hotkey Function

Ctrl+A Moves the cursor to the beginning of the current line.

Ctrl+B Moves the cursor one character to the left.

Ctrl+C Stops performing a command.

Ctrl+D Deletes the character at the current cursor position.

Ctrl+E Moves the cursor to the end of the current line.

Ctrl+F Moves the cursor one character to the right.

Ctrl+H Deletes the character to the left of the cursor.

Ctrl+K Terminates an outgoing connection.

Ctrl+N Displays the next command in the history command buffer.

Ctrl+P Displays the previous command in the history command buffer.

Ctrl+R Redisplays the current line information.

Ctrl+V Pastes the content in the clipboard.

Ctrl+W Deletes all the characters in a continuous string to the left of the cursor.

Ctrl+X Deletes all characters to the left of the cursor.

Ctrl+Y Deletes all characters to the right of the cursor.

Ctrl+Z Exits to user view.

Ctrl+] Terminates an incoming connection or a redirect connection.

Hotkey Function

Esc+B Moves the cursor to the leading character of the continuous string to the left.

Esc+D

Deletes all the characters of the continuous string at the current cursor position and

to the right of the cursor.

Esc+F Moves the cursor to the front of the next continuous string to the right.

Esc+N Moves the cursor down by one line (available before you press Enter)

Esc+P Moves the cursor up by one line (available before you press Enter)

Esc+< Specifies the cursor as the beginning of the clipboard.

Esc+> Specifies the cursor as the ending of the clipboard.

NOTE:

The hotkeys in Table 3 are d

efined by the switch. If the same hotkeys are defined by the terminal software

that you use to interact with the switch, the hotkeys defined by the terminal software take effect.

Redisplaying entered but not submitted commands

If your command input is interrupted by output system information, you can use this feature to redisplay

the commands entered previously but not submitted.

Follow these steps to enable redisplaying of commands previously entered but not submitted:

To do… Use the command… Remarks

Enter system view system-view —

Enable redisplaying of entered

but not submitted commands

info-center synchronous

Required

Disabled by default

NOTE:

With this feature enabled, the following rules apply:

• If you have no input at the command line prompt and the system outputs system information such as

logs, the system will not display the command line prompt after the output.

• If the system outputs system information when you are entering

interactive information (not YES/NO for

confirmation), the system does not redisplay the prompt information but a line break after the output and

then display what you have entered.

• For more information about the info-center synchronous command, see

Network Management and

Monitoring Command Reference

Understanding command-line errors

If a command contains syntax errors, the CLI reports error information. Table 4 lists some common

command line errors.

Table 4 Common command line errors

Error information Cause

% Unrecognized command found at '^' position.

The command was not found.

Error information Cause

% Incomplete command found at '^' position. Incomplete command

% Ambiguous command found at '^' position. Ambiguous command

Too many parameters Too many parameters

% Wrong parameter found at '^' position. Wrong parameters

Using command history

The CLI automatically saves the commands recently used in the history command buffer. You can access

these commands and execute them again.

Accessing history commands

Follow a step below to access history commands:

To do… Use the key/command… Result

Display history commands

display history-command [ |

{ begin | exclude | include }

regular-expression ]

Displays valid history commands you

used

Display the previous history

command

Up arrow key or Ctrl+P

Displays the previous history command, if

any

Display the next history

command

Down arrow key or Ctrl+N Displays the next history command, if any

NOTE:

You can use arrow keys to access history commands in Windows 200X and XP Terminal or Telnet.

However, in Windows 9X HyperTerminal, you need to use Ctrl+P or Ctrl+N, because they are defined

differently and the up and down arrow keys are invalid.

• The commands saved in the history command buffer are in the same format in which you entered

the commands. If you enter an incomplete command, the command saved in the history command

buffer is also incomplete.

• If you execute the same command repeatedly, the switch saves the earliest record. However, if you

execute the same command in different formats, the system saves them as different commands. For

example, if you execute the display cu command repeatedly, the system saves only one command

in the history command buffer. If you execute the command in the format of display cu and display

current-configuration respectively, the system saves them as two separate commands.

• By default, the CLI can save up to 10 commands for each user. To set the capacity of the history

command buffer for the current user interface, use the history-command max-size command. (For

more information about the history-command max-size command, see Fundamentals Command

Reference.

Configuring the history buffer size

Follow these steps to configure the history buffer size:

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H3C S5500-HI Switch Series Fundamentals Configuration Manual

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Type: Fundamentals Configuration Manual

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